All coasters in one safe place. All coasters are made withe epoxy resin and are heat safe for up t0 110 degrees so they will take a hot black coffee just be mind full with hot things like that you don't want to discolour or warp the resin. Coasters are not limited to just being cup holders. Using them as trinket to jewellery holders is totally practical. Your mind is the only limit to its uses ;)
Don't forget to take me in photo to send them to me. @Brooke_Goldie_Artist on Instagram.